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Diffstat (limited to 'src/common/settings_setting.h')
| -rw-r--r-- | src/common/settings_setting.h | 413 |
1 files changed, 413 insertions, 0 deletions
diff --git a/src/common/settings_setting.h b/src/common/settings_setting.h new file mode 100644 index 000000000..f226e38d4 --- /dev/null +++ b/src/common/settings_setting.h @@ -0,0 +1,413 @@ +#pragma once + +#include <map> +#include <optional> +#include <string> +#include <typeindex> +#include <typeinfo> +#include "common/common_types.h" +#include "common/settings_common.h" +#include "common/settings_enums.h" + +namespace Settings { + +/** The Setting class is a simple resource manager. It defines a label and default value + * alongside the actual value of the setting for simpler and less-error prone use with frontend + * configurations. Specifying a default value and label is required. A minimum and maximum range + * can be specified for sanitization. + */ +template <typename Type, bool ranged = false> +class Setting : public BasicSetting { +protected: + Setting() = default; + + /** + * Only sets the setting to the given initializer, leaving the other members to their default + * initializers. + * + * @param global_val Initial value of the setting + */ + explicit Setting(const Type& val) + : value{val}, + default_value{}, maximum{}, minimum{}, label{}, category{Category::Miscellaneous}, id{} {} + +public: + /** + * Sets a default value, label, and setting value. + * + * @param linkage Setting registry + * @param default_val Initial value of the setting, and default value of the setting + * @param name Label for the setting + * @param category_ Category of the setting AKA INI group + */ + explicit Setting(Linkage& linkage, const Type& default_val, const std::string& name, + enum Category category_, bool save_ = true, bool runtime_modifiable_ = false) + requires(!ranged) + : value{default_val}, default_value{default_val}, label{name}, category{category_}, + id{linkage.count}, save{save_}, runtime_modifiable{runtime_modifiable_} { + linkage.by_category[category].push_front(this); + linkage.count++; + } + virtual ~Setting() = default; + + /** + * Sets a default value, minimum value, maximum value, and label. + * + * @param linkage Setting registry + * @param default_val Initial value of the setting, and default value of the setting + * @param min_val Sets the minimum allowed value of the setting + * @param max_val Sets the maximum allowed value of the setting + * @param name Label for the setting + * @param category_ Category of the setting AKA INI group + */ + explicit Setting(Linkage& linkage, const Type& default_val, const Type& min_val, + const Type& max_val, const std::string& name, enum Category category_, + bool save_ = true, bool runtime_modifiable_ = false) + requires(ranged) + : value{default_val}, default_value{default_val}, maximum{max_val}, minimum{min_val}, + label{name}, category{category_}, id{linkage.count}, save{save_}, + runtime_modifiable{runtime_modifiable_} { + linkage.by_category[category].push_front(this); + linkage.count++; + } + + /** + * Returns a reference to the setting's value. + * + * @returns A reference to the setting + */ + [[nodiscard]] virtual const Type& GetValue() const { + return value; + } + + /** + * Sets the setting to the given value. + * + * @param val The desired value + */ + virtual void SetValue(const Type& val) { + Type temp{ranged ? std::clamp(val, minimum, maximum) : val}; + std::swap(value, temp); + } + + /** + * Returns the value that this setting was created with. + * + * @returns A reference to the default value + */ + [[nodiscard]] const Type& GetDefault() const { + return default_value; + } + + /** + * Returns the label this setting was created with. + * + * @returns A reference to the label + */ + [[nodiscard]] const std::string& GetLabel() const override { + return label; + } + + /** + * Returns the setting's category AKA INI group. + * + * @returns The setting's category + */ + [[nodiscard]] enum Category Category() const override { + return category; + } + + [[nodiscard]] bool RuntimeModfiable() const override { + return runtime_modifiable; + } + + [[nodiscard]] constexpr bool IsEnum() const override { + return std::is_enum<Type>::value; + } + + /** + * Returns whether the current setting is Switchable. + * + * @returns If the setting is a SwitchableSetting + */ + [[nodiscard]] virtual constexpr bool Switchable() const override { + return false; + } + +protected: + std::string ToString(const Type& value_) const { + if constexpr (std::is_same<Type, std::string>()) { + return value_; + } else if constexpr (std::is_same<Type, std::optional<u32>>()) { + return value_.has_value() ? std::to_string(*value_) : "none"; + } else if constexpr (std::is_same<Type, bool>()) { + return value_ ? "true" : "false"; + } else if (std::is_same<Type, AudioEngine>()) { + return CanonicalizeEnum(value_); + } else { + return std::to_string(static_cast<u64>(value_)); + } + } + +public: + /** + * Converts the value of the setting to a std::string. Respects the global state if the setting + * has one. + * + * @returns The current setting as a std::string + */ + std::string ToString() const override { + return ToString(this->GetValue()); + } + + /** + * Returns the default value of the setting as a std::string. + * + * @returns The default value as a string. + */ + std::string DefaultToString() const override { + return ToString(default_value); + } + + /** + * Assigns a value to the setting. + * + * @param val The desired setting value + * + * @returns A reference to the setting + */ + virtual const Type& operator=(const Type& val) { + Type temp{ranged ? std::clamp(val, minimum, maximum) : val}; + std::swap(value, temp); + return value; + } + + /** + * Returns a reference to the setting. + * + * @returns A reference to the setting + */ + explicit virtual operator const Type&() const { + return value; + } + + /** + * Converts the given value to the Setting's type of value. Uses SetValue to enter the setting, + * thus respecting its constraints. + * + * @param input The desired value + */ + void LoadString(const std::string& input) override { + if (input.empty()) { + this->SetValue(this->GetDefault()); + return; + } + try { + if constexpr (std::is_same<Type, std::string>()) { + this->SetValue(input); + } else if constexpr (std::is_same<Type, std::optional<u32>>()) { + this->SetValue(static_cast<u32>(std::stoul(input))); + } else if constexpr (std::is_same<Type, bool>()) { + this->SetValue(input == "true"); + } else if constexpr (std::is_same<Type, AudioEngine>()) { + this->SetValue(ToEnum<Type>(input)); + } else { + this->SetValue(static_cast<Type>(std::stoll(input))); + } + } catch (std::invalid_argument) { + this->SetValue(this->GetDefault()); + } + } + + [[nodiscard]] std::string constexpr Canonicalize() const override { + if constexpr (std::is_enum<Type>::value) { + return CanonicalizeEnum(this->GetValue()); + } + return ToString(this->GetValue()); + } + + /** + * Returns the save preference of the setting i.e. when saving or reading the setting from a + * frontend, whether this setting should be skipped. + * + * @returns The save preference + */ + virtual bool Save() const override { + return save; + } + + /** + * Gives us another way to identify the setting without having to go through a string. + * + * @returns the type_index of the setting's type + */ + virtual std::type_index TypeId() const override { + return std::type_index(typeid(Type)); + } + + virtual constexpr u32 Id() const override { + return id; + } + + virtual std::string MinVal() const override { + return this->ToString(minimum); + } + virtual std::string MaxVal() const override { + return this->ToString(maximum); + } + +protected: + Type value{}; ///< The setting + const Type default_value{}; ///< The default value + const Type maximum{}; ///< Maximum allowed value of the setting + const Type minimum{}; ///< Minimum allowed value of the setting + const std::string label{}; ///< The setting's label + const enum Category category; ///< The setting's category AKA INI group + const u32 id; + bool save; + bool runtime_modifiable; +}; + +/** + * The SwitchableSetting class is a slightly more complex version of the Setting class. This adds a + * custom setting to switch to when a guest application specifically requires it. The effect is that + * other components of the emulator can access the setting's intended value without any need for the + * component to ask whether the custom or global setting is needed at the moment. + * + * By default, the global setting is used. + */ +template <typename Type, bool ranged = false> +class SwitchableSetting : virtual public Setting<Type, ranged> { +public: + /** + * Sets a default value, label, and setting value. + * + * @param linkage Setting registry + * @param default_val Initial value of the setting, and default value of the setting + * @param name Label for the setting + * @param category_ Category of the setting AKA INI group + */ + explicit SwitchableSetting(Linkage& linkage, const Type& default_val, const std::string& name, + Category category, bool save = true, bool runtime_modifiable = false) + requires(!ranged) + : Setting<Type, false>{linkage, default_val, name, category, save, runtime_modifiable} { + linkage.restore_functions.emplace_back([this]() { this->SetGlobal(true); }); + } + virtual ~SwitchableSetting() = default; + + /** + * Sets a default value, minimum value, maximum value, and label. + * + * @param linkage Setting registry + * @param default_val Initial value of the setting, and default value of the setting + * @param min_val Sets the minimum allowed value of the setting + * @param max_val Sets the maximum allowed value of the setting + * @param name Label for the setting + * @param category_ Category of the setting AKA INI group + */ + explicit SwitchableSetting(Linkage& linkage, const Type& default_val, const Type& min_val, + const Type& max_val, const std::string& name, Category category, + bool save = true, bool runtime_modifiable = false) + requires(ranged) + : Setting<Type, true>{linkage, default_val, min_val, max_val, + name, category, save, runtime_modifiable} { + linkage.restore_functions.emplace_back([this]() { this->SetGlobal(true); }); + } + + /** + * Tells this setting to represent either the global or custom setting when other member + * functions are used. + * + * @param to_global Whether to use the global or custom setting. + */ + void SetGlobal(bool to_global) override { + use_global = to_global; + } + + /** + * Returns whether this setting is using the global setting or not. + * + * @returns The global state + */ + [[nodiscard]] bool UsingGlobal() const override { + return use_global; + } + + /** + * Returns either the global or custom setting depending on the values of this setting's global + * state or if the global value was specifically requested. + * + * @param need_global Request global value regardless of setting's state; defaults to false + * + * @returns The required value of the setting + */ + [[nodiscard]] virtual const Type& GetValue() const override { + if (use_global) { + return this->value; + } + return custom; + } + [[nodiscard]] virtual const Type& GetValue(bool need_global) const { + if (use_global || need_global) { + return this->value; + } + return custom; + } + + /** + * Sets the current setting value depending on the global state. + * + * @param val The new value + */ + void SetValue(const Type& val) override { + Type temp{ranged ? std::clamp(val, this->minimum, this->maximum) : val}; + if (use_global) { + std::swap(this->value, temp); + } else { + std::swap(custom, temp); + } + } + + [[nodiscard]] virtual constexpr bool Switchable() const override { + return true; + } + + [[nodiscard]] virtual std::string ToStringGlobal() const override { + return this->ToString(this->value); + } + + /** + * Assigns the current setting value depending on the global state. + * + * @param val The new value + * + * @returns A reference to the current setting value + */ + const Type& operator=(const Type& val) override { + Type temp{ranged ? std::clamp(val, this->minimum, this->maximum) : val}; + if (use_global) { + std::swap(this->value, temp); + return this->value; + } + std::swap(custom, temp); + return custom; + } + + /** + * Returns the current setting value depending on the global state. + * + * @returns A reference to the current setting value + */ + virtual explicit operator const Type&() const override { + if (use_global) { + return this->value; + } + return custom; + } + +protected: + bool use_global{true}; ///< The setting's global state + Type custom{}; ///< The custom value of the setting +}; + +} // namespace Settings |